Resolved: Remove duplicates from a list and remove elements at same index in another list

['fish', 'Robert', 'dog', 'ball', 'cat', 'dog', 'Robert']
['animal', 'person', 'animal', 'object', 'animal', 'animal', 'person']

['fish', 'Robert', 'dog', 'ball', 'cat']
['animal', 'person', 'animal', 'object', 'animal']

# Inputs
list1 = ['fish', 'Robert', 'dog', 'ball', 'cat', 'dog', 'Robert']
list2 = ['animal', 'person', 'animal', 'object', 'animal', 'animal', 'person']

# New lists
new_list1 = []
new_list2 = []

# Loop through elements of input lists
for a, b in zip(list1, list2):
    # If it isn't a duplicate, append to the new lists
    if a not in new_list1:
        new_list1.append(a)
        new_list2.append(b)

# Output new lists
print(new_list1)
print(new_list2)

['fish', 'Robert', 'dog', 'ball', 'cat']
['animal', 'person', 'animal', 'object', 'animal']

# This uses the fact that dictionaries have unique keys, so this cancels out all the duplicates
x = dict(zip(
    ['fish', 'Robert', 'dog', 'ball', 'cat', 'dog', 'Robert'],
    ['animal', 'person', 'animal', 'object', 'animal', 'animal', 'person']
))

# Output dictionary
print(x)

# Output keys (equivalent of new_list1)
print(list(x.keys()))

# Output values (equivalent of new_list2)
print(list(x.values()))

{'fish': 'animal', 'Robert': 'person', 'dog': 'animal', 'ball': 'object', 'cat': 'animal'}
['fish', 'Robert', 'dog', 'ball', 'cat']
['animal', 'person', 'animal', 'object', 'animal']